On Sun, Jan 14, 2018 at 1:40 AM, Brent Meeker <meeke...@verizon.net> wrote:
>> >> I think that would be true if, as in your example, the observer were >> freely falling into the Black Hole, but if I was hovering just outside the >> Event Horizon in a super powerful spaceship I could observe the Black Hole >> evaporating in just a few minutes > > > > That seems doubtful since Hawking radiation has its peak wavelength on the > order of the diameter of the black hole and originates in the vicinity, > i.e. within a few radii of the black hole, not "at the event horizon". > > Most Hawking radiation originates where the tidal forces are the greatest, and that would be at the Event Horizon. The closer I hover above the Event Horizon the slower my clock will tick, so if I hover close enough I can watch the entire Black Hole evaporate away in just a few minutes by my clock even though for you back on Earth that would take a billion trillion years or so. The thing that causes Black Hole evaporation is Hawking radiation, so if I observe one I'm going to have to observe the other, although "observe" may not be the right word, "incinerate" might be better. John K Clark -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
